Excavating device



- Aug. 26 1924. I

1,506,077 J. W. PAGE EXCAVATING DEVICE Filed Jan. 12, 1924 2 Sheets-Sheet l Aug. 26. 1924., I 1,506,077

' J. W. PAGE BXCAVATING DEVI CE Filed Jan. 12, 1924 2 Sheets-Sheet 2 jrvazzZwE 75/02 Zdfl ge Patented Aug 26, 1924.

UNITED STATES JOHN W. PAGE, OF CHICAGO, ILLINOIS.

EXCAVATING DEVICE.

Application filed January-12, 1924. Serial No. 685,750.

To all whom it may concern:

Be it known that 1, JOHN W. PAGE, a

citizenof the United States, residing at- Chicago, in the county of Cook and. State of Illinois, have invented new and useful Improvements in Excavating Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in excavating devices, and is fully described and explained in the specification and shown in the accompanying drawings, in which Fig. 1 is a view in side elevation, showing the bucket on the trolley, Fig. 2 is a similar view showing the bucket in the position it occupies just after the sheave 18 has engaged the stop block 19, Fig. 3 is a similar view showing the bucket dumped, Fig. 4c is a view in front elevation of the sheave over which the holding chain operates, elevation of the same sheaveshowing the holding chain in different positions.

' The excavating device herein shown 15 of the same general type as, and an improvement on, the excavating device shown no my Patent No. 1,194,777, dated August 15, 1916, and its generahmethod of operation is substantially the same. The particular features of difference between this device and the one shown in said patent will be particularly pointed out herein.

my prior patent referred to above.

Referring to the drawings, 5 indicates a cableway provided with the usual means whereby it may be tightened and slackened. Thiscableway is similar to one shownr 111D e present device has been found particularly useful in excavating, gravel pits and for similar purposes where it is sought to dump the material for many successive bucket loads in a predetermined position, as in a hopper (not shown) arranged under the bucket as it dumps. The general arrangeinent of the trolley with respect to the gravel pit and the location of the hopper, are all shown in my prior patent, above referred to, and consequently need not be shown here, since the operation of the device in respect to these features is substantially the same as in said prior patent. The particular construction and operation of the device with respect to its dumping is however somewhat different and will be described in detail hereinafter. The inclination of the cableway 5 is such that the bucket will run down by gravity to the and Figs. 5 and 6 are views in side point at which it is sought to have it work, and therefore there is required no mechanism for hauling it in the backward direction in this particular instance.

Mounted upon the cablewa 5 is a trolley which may be of an desira' 1e form, here shown as 'a triangu ar frame 7 carrying grooved rollers or wheels 8 running upon the cableway. Attached to the underside of the trolley is a bail 9, to which is swiveled an excavatin shovel 10, the centers of the oivots prefera 1y being behind the center of gravity of said shovel. The bail 9 may be of any suitable form and is here shown as formed of two chains separated near their lower ends by means of the spreader bar 9'.

11 indicates the hauling chains, 12 is the holding chain thereof, and 13 is the loading line or main hauling line, to which the holding chain 12 and the two hauling chains 11 are attached, as is common practice in the Page buckets now ,used for excavating purposes.

In the device here shown the holding chain 12 runs over a block 15 attached to the trolley 7. The block 15 is attached to the underside of the trolley 7. Over this block runs the holding chain 12, the forward end of which is secured "to the main hauling line or loadin line 13 by means of the link 13'. From t is point it runs upwardly and backwardly over the block 15 and thence is led downwardly to the upper forward part of the bucket, where it is attached at the center as indicated by 14. The block 15 is provided with a double grooved sheave 15, shown removed from the block in Fig. 4. The two grooves of this sheave are concentrically arranged, one being larger than the other. I have indicated the smaller groove by 76 and the largergroove by 77. The larger groove is formed by the flanged discs 78 forming the sides of the sheave. The holding chain 12 carries at one point a lock bar 81. This bar is preferably made of a flat strip of metal bent as shown and thin enough so that it will pass between the discs 78 and run down on the smaller groove 76 (see Fig. 5). The rest of the holding chain 12 is large enough so that it will not pass between the discs 78, but will run up on the larger groove 77 at the periphery of the discs 78 (see Fig. 4). The locking bar 81 is so placed in the chain 12 that when the bucket menced to dump (as shown in Fig. 1), said bar will be in the position substantially as shown in Fig. 5. When in this position it will be noted that the locking bar 81 is in between thediscs 78 resting on the-smaller groove 76. This will give a leverage in favor of the end of the holding chain 12 attached to the end of the loading line or main hauling line 13, so that but a slight tautness on said hauling line 13 will some to maintain sufficient tension on the holding chain 12 to prevent dumping of the bucketl 16 indicates a sheave carried preferably near the point where the holding chain 12 joins the loading line 13. A rope 17 1s (.Ol'l, nected to the holding chain 12 a slight distance above the bucket at the point indicated by the reference numeral 17'. From this oint the rope 17 runs under the sheave 16 and up to another sheave 18, which runs on the cableway 5. 19 indicates a stop block on the cableway at about the point where the dumping is to occur.

The operation of the device is as follows: As the bucket is drawn forward, the tautness maintained on the holding chain 12 by the pull of the hauling line 13 is suflicient to prevent the bucket from dumping. When the sheave 18 strikes the block 19, the holding chain 12 is pulled from the point 17' over the sheave 16, as shown inFigure 2. When this occurs the holding chain 12 runs up on the larger groove of the sheave 16 and the locking bar 81 is pulled out of the sheave, thus destroying the locking effect of thislocking bar. At this point, if tension. is maintained on the main hauling line 13 the bucket is still prevented from dumping. Such tension is transmitted through the rope 17 to the point 17 on the.

holding chain and the holding chain above this point is likewise exerting a pull upwardly and in the opposite direction so that the component of the forces by the holding chain above the point 17' and the rope 17 exerts an upward pull on the short lower end of the holding chain below the point 17 to prevent the bucket from tilting or dumping. When it is desired to dump the bucket, the hauling line 13 is slackened by the operator and this slaekeningreleases the pull on the rope 17 and also on the holding chain 12 and permits the bucketto dump,

v as shown in Figure 3.

It is to be noted thatv the position of the locking bar 81 on the sma ler groove 76, as shown in Fig. 5, assists in preventing the dumping yOf the bucket, since in this position it gives a leverage in favor of the end of the holding chain 12 attached to the end of the loading line 13, so that but a slight tautness on the hauling line 13 will serve to maintain suflicient tension on the holding chain 12 to prevent dumping of the ing this leverage.

bucket. When the sheave 18 engages the stop block 19, the locking bar 81 is pulled off of the sheave 15 so that the chain 12 runs u on the larger groove thus destroy- With this leverage destroyed, but a slight slackening of the hauling line 13 givessufli'cient slack to the holding chain 12 to permit free and complete dumping of the bucket.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modi- Changes, therefore, in the confications. struction and arrangement may be made without departing from the spirit andscope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as possible in view of the prior art.

What I claim as new and desire to secure by Letters Patent, is: p

1. In an apparatus of the character set forth, the combination of a main cable, a carriage movable thereon, a scraper bucket pivotally mounted on said carriage in the rear of the center of gravity of the bucket when loaded, a hauling line for pulling the bucket along said main cable, a block attached to the carriage, a holding chain running from the front of the bucket over said block to the hauling line, means arranged in connection with said block whereby a leverage in favor of the end of the holding chain attached to the hauling line is established when the bucket is in load-retaining position and destroyed when said bucket is in partial or complete dumping position, and means engaging said hauling line in advance of said bucket operating at a predetermined point to directly pull the holding chain over the block attached to the carriage toward thefront end of the bucket. 4

In an pp a of they character- 56i? forth, the combination of a main bl carriage movable thereon,- a scraper bucket,

pivotally mounted on said carriage in the-* rear of the center of gravity ofthe bucketwhen loaded, a hauling line for pulling the the main cable in the path of movement of I said last mentioned block, and a cable connected to the block running on the main cable, passing over the block on the end of the hauling line, and attached to the holding chain near its point of attachment to the front end of the bucket. 4

3. In an apparatus of the character set forth,-the com ination of a main cable, a carria movable thereon, a scraper'bucket pivota y'mount'ed on said carriage in the rear of the center of gravity of the bucket when loaded, a hauling line for pulling the bucket along said main cable, a block attached to the carriage, a holding chain runfrom the front of the bucket over said block to the hauling line, and means operating at a predetermined point in the travel ninifrom the front of the bucket over said bloc to the hauling line, a block on the end of the hauling line, a block running on the main cable, a rope attached to the block running on the main cable, passing over the block on the end of the hauling line, and attached to the holding chain near its point 0 attachment to the front end of the bucket, and a stop on the main cable lying in the path of the block running on the mam cable. 5. In an ap aratus of the character set forth, the com ination of a main cable, a

carria e movable thereon, a scraper bucketpivota y mounted on said carria e in the rear of the center of gravity of't e bucket when loaded, a hauling line for pulling the bucket along said mam cable, a block attached to the carriage, a holding chain running from the front of the bucket over said block to the hauling line, a locking bar in said holding chain, said locking bar being normally in engagement with the block when the bucket is in load-retaining ition, and means operating by the pull 0 the hauling line at a predetermined point in the travel of the bucket to directly pull said locking bar away from said block. 6. In an ap aratus of the character set forth, the 00m carria movable thereon, a scraper bucket pivota y mounted on said carria e in the rear of the center of gravity of t e bucket when loaded, a hauling line for pulling the bucket along said main cable, a double poved block attached to thecarriage, a olding chain runnin from the front of the bucket over said lock to the hauling line, a lockin bar in said holding chain, said lockin bar normally in engagement with e block w en the bucket is in loadretaining position, and means operating by the pull of the hauling line at a predetermined point in the travel of the bucket to directly pull said locking bar away from said block.

7. In an ap aratus of the character set forth, the com ination of a main cable, a carria e movable thereon, a scraper bucket pivota y mounted on said carriage in the rear of the center of gravity of the bucket when loaded, a hauling line for pulling the bucket along said mam cable, a block attached to the carriage, a holding chain runmng from the front of the bucket over said f block to the hauling line, a locking bar in said holding chain, said locking bar being nor'mall in engagement with the block when the hue et is m load-retaining position, a block on-theend of the hauling line, a block running on the main cable, a rope attached to the block running on the main cable, ing over the block on the end of the Ziling line and attached to the holding chain below the locking bar, and a stop on the main cable 1 ing in the path of the block runnin on t e main cable.

ination of a main cable, a

In witness whereof, I have hereunto set 

